DNS/unbound/ubuntu/defaultについて、ここに記述してください。

/usr/share/doc/unbound/examples/unbound.conf 

server:
        verbosity: 1

        # The default is to listen to localhost (127.0.0.1 and ::1).


        # port to answer queries from
        # port: 53
        # permit unbound to use this port number or port range for
        # making outgoing queries, using an outgoing interface.
        # outgoing-port-permit: 32768

        # deny unbound the use this of port number or port range for
        # making outgoing queries, using an outgoing interface.
        # Use this to make sure unbound does not grab a UDP port that some
        # other server on this computer needs. The default is to avoid
        # IANA-assigned port numbers.
        # If multiple outgoing-port-permit and outgoing-port-avoid options
        # are present, they are processed in order.
        # outgoing-port-avoid: "3200-3208"

        # Enable IPv4, "yes" or "no".
        # do-ip4: yes

        # Enable IPv6, "yes" or "no".
        # do-ip6: yes

        # Enable UDP, "yes" or "no".
        # do-udp: yes

        # Enable TCP, "yes" or "no".
        # do-tcp: yes

        # upstream connections use TCP only (and no UDP), "yes" or "no"
        # useful for tunneling scenarios, default no.
        # tcp-upstream: no

        # control which clients are allowed to make (recursive) queries
        # to this server. Specify classless netblocks with /size and action.
        # By default everything is refused, except for localhost.
        # Choose deny (drop message), refuse (polite error reply),
        # allow (recursive ok), allow_snoop (recursive and nonrecursive ok)
        # deny_non_local (drop queries unless can be answered from local-data)
        # refuse_non_local (like deny_non_local but polite error reply).
        # access-control: 0.0.0.0/0 refuse
        # access-control: 127.0.0.0/8 allow
        # access-control: ::0/0 refuse
        # access-control: ::1 allow
        # access-control: ::ffff:127.0.0.1 allow

        # the log file, "" means log to stderr. 
        # Use of this option sets use-syslog to "no".
        # logfile: ""

        # Log to syslog(3) if yes. The log facility LOG_DAEMON is used to 
        # log to, with identity "unbound". If yes, it overrides the logfile.
        # use-syslog: yes 

        # print UTC timestamp in ascii to logfile, default is epoch in seconds.
        # log-time-ascii: no
        
        # print one line with time, IP, name, type, class for every query.
        # log-queries: no